Like DNA, RNA is a complex molecule made of repeating units of thousands of smaller molecules called nucleotides that link together in very specific, patterned ways.
像DNA一样，RNA也是由数千个被称为核苷酸的更小分子构成的，这些核苷酸之间以非常特定的模式连接在一起。
Secondly it must have been able to quickly assemble a genetic molecule that could make copies of itself without the need for more elaborate bio-machinery like RNA and DNA -- that would evolve later.
其次它必须很快的生成遗传因子使得它能够自我复制，当然也不需要更多精心制造的”生物机器“——RNA,DNA什么的没那么早出现。
Its biochemistry would work just like ours-dna to RNA to proteins-but it would be completely incompatible with earthly life, its chiral twin.
这种细胞的生物化学运作过程和普通生命完全一样——从DNA到RNA再到蛋白质，但它与手性对应的地球生命可能完全不相容。
RNA, the single-stranded precursor to DNA, normally expands one nucleic base at a time, growing sequentially like a linked chain.
DNA的单链前体分子，一般一次延伸一个碱基，就像延长的锁链。
RNA, the single-stranded precursor to DNA, normally expands one nucleic base at a time, growing sequentially like a linked chain.
DNA的单链前体分子，一般一次延伸一个碱基，就像延长的锁链。
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